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how-do-we-know-how-fast-gravity-waves-travel https://www.astronomy.com/issues/2016/page/7/ 2016 Issue | Page 7 of 12 | Astronomy.com https://www.astronomy.com/uploads/2021/09/Gravitationalwave.jpg InStock USD 1.00 1.00 cosmology article ASY 2023-05-18 2016-06-27 47686
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2016

The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in an easy-to-understand, user-friendly style that's perfect for astronomers at any level.
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Cosmology

How do we know how fast gravity waves travel?

Observing

Exploring Hercules

Solar System

Are impactors more prevalent in the outer solar system than they are in the inner solar system? Does this affect how surface ages are estimated?

Observing

Lounging in Lyra

Telescopes and Equipment

How does one determine magnification? I have an Edmund Scientific Astroscan, 4-1/8-inch aperture, F/4.2 reflecting telescope, used with a 2.5x Barlow lens and a 28mm Plossl eyepiece.

Telescopes and Equipment

I am struggling to find a system for telescopic observations of the planets and their major moons worthy of photographing. One wrinkle: I am in a wheelchair and almost blind.

Science

Pulsars and neutrinos

The Moon

The Nubium Whisker

Astrophotography

Stellar neighbors

Exoplanets, Observing, Planets, Solar System, The Moon

Mercury and Venus return

Science

Plenty of really hot things exist in the universe. But do we know of fire anywhere besides on our planet?

Science

Feel the force

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